Display screen with a graphical user interface for power management



FIG. 1 is a front view of a first image in a sequence of a display screen with a graphical user interface for power management according to the new and ornamental design; and,

FIG. 2 is a second image thereof.

The broken lines showing the display screen form no part of the claimed design. The remaining broken lines showing portions of the graphical user interface form no part of the claimed design. 

CLAIM The ornamental design for a display screen with a graphical user interface for power management, as shown and described. 